Noise rating
BG 87/2024, Useful Information Guide, written by Chin Hang “Kay” Lam and published by BSRIA in 2024, defines noise rating (NR) as: ‘A criterion, often used in building specifications, for acceptable noise levels. A noise rating gives sound pressure levels (in decibels – dB) which must not be exceeded for a range of octave bands.’
'Noise ratings are a means of specifying acceptable indoor noise levels. Each noise rating (NR) curve gives sound pressure levels which must not be exceeded for a range of octave bands. This acknowledges that higher-frequency sound is considered more intrusive than lower-frequency sound. The graph below shows the maximum allowable sound pressure levels at each octave band for each noise rating. It also illustrates that for NR30, the maximum is 40 dB at 250 Hz, 34 dB at 500 Hz, and 30 dB at 1,000 Hz. Typical noise ratings for a variety of spaces can be found in BG 85 (BG 85/2024 Mechanical Criteria).'
--BSRIA
[edit] Related articles on Designing Buildings
Featured articles and news
The general election and the construction industry
As PM, Rishi Sunak announces July 4 date for an election.
Tackling the lack of knowledge or confidence in heat pumps
The CICV Green Home Festival part of the Edinburgh Fringe.
Home improvements swapped for green energy upgrades
As applications down since and desire to reduce bills up.
Eco apprenticeships continue help grow green workforce
A year after being recognised at the King's coronation.
The Use of Natural Insulation Materials in Retrofit
New paper from STBA with support from SDF.
National Retrofit Hub in partnership with InstallerSHOW.
Permitted development rights for agricultural buildings
The changes coming into effect as of May 21, 2024.
Biodiversity and the built environment digital series
The nature of building, with CIOB and CWP.
A call for prevention and sensitive re-use.
Risks to the long-term effectiveness of the BNG scheme
National Audit Office publish review of Biodiversity Net Gain.
The CIAT principal designer register
Providing assurance and verification of the capability and competence of registered ATs.
Building Safety recommendations and Northern Ireland
The NI roadmap to improving safety in high rise residential.
Specifying rendered external wall insulation for fire safety
How to interrogate the evidence provided to the specifier.
The benefits of writing articles for your organisation
How to create a profile for your organisation and publish for free.
Scottish Government action to reach net-zero targets
Retrofit expert group highlight critical actions needed.
A forward thinking, inclusive global community of members.